What famous incident directly lead to the creation of the u. s constitution?

Explanation:

Daniel Shays led around four thousand rebels to protest agains crown injustice. Shay's engages in fight was crucial to measure the real power that the Empire had, in order to be prepared against anything.

All these event was an example about how confederations are weak, and led to a federal policy in this matter.

i don't know why don't you google it?

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.